CHULA VISTA, Calif. -- A judge Wednesday appointed a new attorney for an ex- Chula Vista Elementary School District instructional aide who indicated he wants to withdraw his guilty plea to a charge of molesting a teenage girl.

South Bay Judge Timothy Walsh granted the motion by Vincent Matthew Lopez to replace his lawyer and scheduled a status conference for Tuesday.

A different judge was supposed to sentence Lopez to a year in jail.

The defendant was arrested last February, after a 15-year-old relative called police to report that Lopez had sexually assaulted her. Lopez was subsequently also charged with molesting another girl of similar age.

Last month, Lopez pleaded guilty to one count of committing a lewd act on a child.

The defendant, a part-time employee for the school district, was placed on administrative leave following his arrest. There were no indications that any of the assaults occurred at Halecrest and Tiffany elementary schools, where Lopez worked, authorities said.

If the defendant's motion to withdraw his guilty plea is denied, he will be sentenced to 365 days in custody and ordered to have no contact with both victims for five years, according to prosecutors.